IgorT
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Custom 405nm (or multilayer) AR coated glass lenses - Interest gauge
At the moment, i am having custom 405nm AR coated single element glass lenses made, mainly for my Blu Rays. They were designed to increase the power of 405nm lasers. The power increase should be 20 - 30%, compared to acrylic lenses. Hopefully more, because of the correct AR coating. Their focal length will be between the acrylics and the Meredith glass lens. The beam will be a bit tighter than with acrylics and more easily focusable, than with the Meredith glass lens.
For comparison, i also ordered a smaller number of the same lenses with a multilayer AR coating (400-750nm), which should be great for red lasers (or any other wavelength), and could allow making focusable ~300mW reds.
The lenses will fit into the plastic AixiZ nut, so they can be used everywhere, where the AixiZ lenses fit.
I will receive the first batch in under three weeks, and post the results (the lenses from the first batch will not be for sale - they are mainly for testing, and they are all spoken for already).
After that, if they test well, we could do a Group Buy and i would order more of them for anyone interested. But because GBs take too long, i decided to post a feeler now, so people can express their interest up front. When the test results are in, you can decide if you want them, and we can have more of them made.
The price i'm paying for the first batch is around 15 Euro ($23.6) a piece. This price is only so you get an approximate idea of what to expect, i won't know the final price until i know, how many we would actually order. Lenses mounted in the lens nut would cost a bit more, because of the extra material involved.
In a GB, they could be a bit cheaper, than what i'm paying now. If you mount it in your own plastic AixiZ lens nut yourself, you only pay for the bare lens, otherwise it's a little extra. But you should be very careful, while doing so! The lenses should not be touched on the active area with your fingers!
The multilayer coated ones cost 1 Euro more. They would work great for reds, but might let a bit less light through with Blue Rays.
If you are interested, post here, with the amount you would like as well as the type of coating, so that i can give the manufacturer an approximate amount, and get a price quote. Interest is non obligatory, this is just so i know the potential number of lenses, that would be ordered if they work as well as they are meant to.
In the next post i will try to explain why these lenses are going to work so well with Blue Rays.